JVC DILA FP Type Displays
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JVC THX HD750 DILA projector
I had a chance yesterday to calibrate my first JVC THX unit at a client’s home.
Calibration is all done in the user side and all the controls we want are there. Grayscale offers both gains and offsets so that is good. There is a more in depth multipoint gamma/grayscale system in the user menu too. I did not have to use this part. When you get a final answer with average dE at 0.7 and nothing over 2 … you stop caring about further fine tuning.
The grayscale controls work fine.
The TV has CMS now … all 18 controls too … each color has a saturation, hue, and brightness associated with it.
Now here is the problem. I’m not sure the CMS works right.
There is not enough range in the CMS to reduce the triangle to Rec 709. YOu can get the red and the blue to hit the target, but the green gets only about 60% closer versus where it starts. The triangle is still too big on the green side. And what is worse … after the CMS is done, when you double check the Jennifer flesh tone, she looks under saturated … enough so that you have to turn up the color saturation to make her look right again. And with that action, the triangle expands back out again.
The filters got use to -9 on the color sat scale … and the image only looked right at +10 … a 19 digit swing. The funny thing here is that I never looked at the Jennifer girl while using the normal wide gamut of the TV so I was never “tainted” by it.
So if you use the CMS … beware of its limitations … and consider that it may just not work right anyway.
CMS … 18 controls
Saturation/Brightness (not just saturation so watch out)
As for the THX mode of the TV … I took a quick shot of where the THX gamut sits and it was pretty close to the 709 triangle. Unless you use the THX, there is no other way to make the gamut even close to 709. All controls in THX mode are locked out except color/brightness/contrast and tint. It is preset to 6500 … but I did not bother to take a grayscale reading at 6500k.
It’s a step forward from the Panasonic and LG THX plasma sets … but not quite there yet. I hope at some point there is an ability to tweak the THX mode to fine tune it. It needs it.
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